Steam-muffler



(No Model.)

W. E. PEARSON.

STEAM MUFFLER.

No. 318,651. Patented May 26, 1885.

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VILLIAM E. PEARSON, OF SAUGUS, MASSACHUSETTS.

STEAM-MUFFLER.

EEJl ECIFICATION forming part of Letters Patent No. 318,651, dated May 26, 1885.

Application filed October 10, 1884.

To (ZZZ whom it may concern.-

Be it known that 1, WILLIAM E. PEARSON, of Saugus, in the county of Essex and State of Massachusetts,have invented certain Improve ments in Steam-Mufflers, of which the following is a specification.

This invention has for its object to provide an improved muffler adapted to deaden the noise caused by escaping steam from locomotive safety-valves, ejectors, &c.

The invention consists in a muffler composed of an inclosing shell or casing, and steamdividing partitions or devices composed in part of coils of spiral wire arranged concentrically between suitable perforated or openwork partitions, and in part of perforated plates and baffie plates or flanges, all arranged as more fully described hereinafter.

Of the accompanying drawings, forming a part of this specification, Figure 1 represents a vertical section of my improved muffler applied to a pop safety-Valve. Fig. 2 represents a top view of the same. Fig. 3 represents a modification.

The same letters of reference indicate the same parts in all the figures.

In the drawings, a represents, the shell or casing of the muffler, which is of cylindrical form, and is shown in the present instance as screwed upon the casing a of a pop safetyvalve, so that the steam escaping through said valve will pass through the casing. To the top of the casing is afiixed a spider or open cap, I), from which depends a bolt or central stud, c. To said bolt are attached one or more smaller spiders or open supports, 6 e 6, two being shown in this instance, although any desired number may be used.

On each support 6 is placed aseries of rings,

0 f f f, of spiral wire, the rings being arranged constitute steam-subdividing partitions with numerous narrow slits or openings, which ef- (No me del.)

fectuall y subdivide the steam passing upwardly through the casing, and thus deaden the harsh sound attending its escape. The rings may be easily put in position, and are not eX- pensive, ordinary iron wire coiled like a spiral spring being used, this being placed in the casing in the form of rings and then secured by the means described. I prefer to place partitions t i, of wire-netting, above and below the rings of spiral wire to additionally subdivide the steam. The spiral-wire rings may be separated by rings or bands j, of thin sheet metal, to prevent the convolutions of the coils from intermeshing.

70 represents a perforated disk or plate placed on the stud 0 between the two series of spiralwire rings, said plate being preferably dished and placed with its concave side down. Zrepresents a flange or baffle-plate secured to the inner surface of the casing and projecting over the outer edge of theplate k. The plate It and flange Z break up the steam between the two series of spiral-wire rings and contribute to the noise-quieting effect.

I desire it to be understood that my invention is not confined to a mufiler in which all of the above-described parts are used.

The spiral-wire rings and their holding devices may be the only subdividing devices used in the casing, if preferred, and one or more series of said rings may be used, as occasion may require.

l1 do not limit myself to the employment of concentric rings of spiral wire, for, if desired, each steam-subdividing partition may be of a single piece or length of spiral wire coiled like a volute spring, as shown in Fig. 3.

I claim 1. In a steam-muifler, the combination of a casing or passage for escaping steam, two fixed spiders or open supports aifixed to said casing, and rings or coils of spiral wire placed between said supports and held thereby to form a steam-subdividing partition, as set forth.

2. The combination of the rings or coils of spiral wire arranged to form a steam-subdividing partition, and the interposed rings or hands of metal, whereby the rings or coils of spiral. wire are kept separate, as set forth.

3. In a muffier, the combination of the casing, two steamsubdividing partitions, each composed of rings or coils of spiral wire, and

the perforatedplate 7t and flange 0r baffle-plate In testimony whereof I have signed my I, arranged between said partitions, as set name to this specification, in the presence of forth. two subscribing witnesses, this 6th day of 0c- 4. The improved muffler composed of the tober, 1884. 5 easing, the open cap or spider b, the stud 0,

depending from said cap, the spiders or open XVILLIAM E. PEARSON. supports 6 e on said stud, the coils 0r rings of spiral wire on said spiders, and the perforated Vitnesses: plate 70 and flange or baffle-plate Z, all arranged O. E. BROWN, 10 substantially as set forth. H. BROWN. 

